1 | initial version |

The capital `D`

is notation for the partial derivative; `D[i]`

means partial derivative with respect to the `i`

th variable of the function (where indexing starts at 0). So `D[0](conjugate)(z)`

means take the partial derivative of the `congugate`

function with respect to variable number 0 (i.e. `z`

), and evaluate that derivative at `z`

.

This notation is not ideal, but was chosen deliberately after some long discussion. An explanation is given at this blog post. Note also that there is a ticket Trac #6344 which aims to change this notation, but it is now almost two years without an update.

2 | No.2 Revision |

The capital `D`

is notation for the partial derivative; `D[i]`

means partial derivative with respect to the `i`

th variable of the function (where indexing starts at 0). So `D[0](conjugate)(z)`

means take the partial derivative of the `congugate`

function with respect to variable number 0 (i.e. `z`

), and evaluate that derivative at `z`

.

This notation is not ideal, but was chosen deliberately after some long discussion. An explanation is given at this blog post. Note also that there is a ticket Trac ~~#6344 ~~6344 which aims to change this notation, but it is now almost two years without an update.

3 | No.3 Revision |

The capital `D`

is notation for the partial derivative; `D[i]`

means partial derivative with respect to the `i`

th variable of the function (where indexing starts at 0). So `D[0](conjugate)(z)`

means take the partial derivative of the `congugate`

function with respect to variable number 0 (i.e. `z`

), and evaluate that derivative at `z`

.

This notation is not ideal, but was chosen deliberately after some long discussion. An explanation is given at this blog post. Note also that there is a Trac ticket ~~Trac ~~6344 which aims to change this notation, but it is now almost two years without an update.

4 | No.4 Revision |

`D`

is notation for the partial derivative; `D[i]`

means partial derivative with respect to the `i`

th variable of the function (where indexing starts at 0). So `D[0](conjugate)(z)`

means take the partial derivative of the `congugate`

function with respect to variable number 0 (i.e. `z`

), and evaluate that derivative at `z`

.

This notation is not ~~ideal, ~~universally loved, but was chosen deliberately after some long discussion. An explanation is given at this blog post. Note also that there is a Trac ticket 6344 which aims to change this notation, but it is now almost two years without an update.

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